Topography and Bathymetry in Alaska
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Transcript of Topography and Bathymetry in Alaska
Topography and Bathymetry in Alaska
Kirk Waters
Alaska Wave Climatologies Workshop
CSC Topography and Bathymetry Efforts
LiDAR Coverage
IFSAR Coverage
CSC Topography and Bathymetry Efforts
** Existing LiDAR beach coverage (blue) enlarged for visualization
JALBTCX Data On-line
Spring 2004 Fall 2004
500 meters landward topography1000 meters seaward bathymetryPlan to cover CONUS oceanfront where there is sand.
Lidar Topography in Shishmaref and Kivalina
• Data collected by Aerometric via NOAA/NGS contract• July and August 2004• Multiple collections done. Some two-meter resolution,
some one-meter resolution.• Classified for bare earth.• Will be available on-line• Approximately 750 million
points
Lidar Topography at Kivalina
NOS Alaska Hydro Surveys
NGDC holdings
T-Sheets and Shoreline
T-sheet zoom
Tundra
What else should we vectorize?
T-sheet Status
Image credit: Jon Swallow
Cape Edgecumbe: Lidar Topo/BathyNGS Data Fusion study
Experiment ObjectivesExperiment Objectives
• Collect Topographic and Bathymetric information safely and at same temporal scale
• Provide NOAA Ship Rainier with shoreline and near shore hydrographic data within days of acquisition
• Test a new concept of survey operations
Topo LIDAR
Bathy LIDAR
Topo/Bathy LIDAR Merged with NOAA Chart
Topo LIDAR MHW Shoreline
Hydrographic Soundings (fathoms)
Topographic Elevations (feet)
Summary
• The Coastal Services Center has coastal topography available for most of CONUS.
• The shoreline for Alaska has been vectorized from T-sheets where they exist.
• More information might be obtainable from the T-sheets if we can determine what is needed.
• Limited high-resolution topography exists, but there is data for Shishmaref and Kivalina
• Combining technologies can provide a seamless elevation dataset across the land-water interface.